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Commit 1cc91fb7 authored by Jaydeep Sen's avatar Jaydeep Sen
Browse files

clk: msm: clock-pll: Add support for sleep enabled pll 



Add new clock ops to be used by sleep enabled plls. It will clear the
sleep enable bit for the pll on getting enabled and assert the sleep
enable bit on getting disabled.

Change-Id: I3b8a9a184403e8f72d8f764d487d64b43bf3bfd1
Signed-off-by: default avatarJaydeep Sen <jsen@codeaurora.org>
parent 718b9859

drivers/clk/msm/clock-pll.c

+54 −0
Original line number Diff line number Diff line
@@ -952,6 +952,60 @@ struct clk_ops clk_ops_pll_acpu_vote = { 
	.list_registers = pll_vote_clk_list_registers,

};





static int pll_sleep_clk_enable(struct clk *c)

{

	u32 ena;

	unsigned long flags;

	struct pll_vote_clk *pllv = to_pll_vote_clk(c);



	spin_lock_irqsave(&pll_reg_lock, flags);

	ena = readl_relaxed(PLL_EN_REG(pllv));

	ena &= ~(pllv->en_mask);

	writel_relaxed(ena, PLL_EN_REG(pllv));

	spin_unlock_irqrestore(&pll_reg_lock, flags);

	return 0;

}



static void pll_sleep_clk_disable(struct clk *c)

{

	u32 ena;

	unsigned long flags;

	struct pll_vote_clk *pllv = to_pll_vote_clk(c);



	spin_lock_irqsave(&pll_reg_lock, flags);

	ena = readl_relaxed(PLL_EN_REG(pllv));

	ena |= pllv->en_mask;

	writel_relaxed(ena, PLL_EN_REG(pllv));

	spin_unlock_irqrestore(&pll_reg_lock, flags);

}



static enum handoff pll_sleep_clk_handoff(struct clk *c)

{

	struct pll_vote_clk *pllv = to_pll_vote_clk(c);



	if (!(readl_relaxed(PLL_EN_REG(pllv)) & pllv->en_mask))

		return HANDOFF_ENABLED_CLK;



	return HANDOFF_DISABLED_CLK;

}



/*

 * This .ops is meant to be used by gpll0_sleep_clk_src. The aim is to utilise

 * the h/w feature of sleep enable bit to denote if the PLL can be turned OFF

 * once APPS goes to PC. gpll0_sleep_clk_src will be enabled only if there is a

 * peripheral client using it and disabled if there is none. The current

 * implementation of enable .ops  clears the h/w bit of sleep enable while the

 * disable .ops asserts it.

 */



struct clk_ops clk_ops_pll_sleep_vote = {

	.enable = pll_sleep_clk_enable,

	.disable = pll_sleep_clk_disable,

	.handoff = pll_sleep_clk_handoff,

	.list_registers = pll_vote_clk_list_registers,

};



static void __set_fsm_mode(void __iomem *mode_reg,

					u32 bias_count, u32 lock_count)

{

include/soc/qcom/clock-pll.h

+1 −0
Original line number Diff line number Diff line
@@ -102,6 +102,7 @@ struct pll_vote_clk { 


extern struct clk_ops clk_ops_pll_vote;

extern struct clk_ops clk_ops_pll_acpu_vote;

extern struct clk_ops clk_ops_pll_sleep_vote;



/* Soft voting values */

#define PLL_SOFT_VOTE_PRIMARY   BIT(0)